Cross sections of the upper extremity: Forearm level

This video tutorial explores the cross sections of the forearm, focusing on the orientation, bones, muscles, and neurovascular structures. It begins with an introduction to the forearm's pronated position and the anatomical directions. The tutorial then covers the bones, including the radius and ulna, and their joints. The muscles are divided into anterior and posterior compartments, with detailed descriptions of each muscle's location and function. Finally, the video examines the major blood vessels and nerves, explaining their paths and connections.

What is the position of the forearm in the cross sections discussed in the tutorial?

• Extended

• Neutral

• Pronated

• Supinated

Which membrane connects the radius and ulna along their shafts?

• Synovial membrane

• Periosteal membrane

• Fibrous membrane

• Interosseous membrane

Which muscle is often absent in the anterior compartment of the forearm?

• Flexor digitorum superficialis

• Flexor carpi radialis

• Pronator teres

• Palmaris longus

What is the mnemonic used to remember the superficial muscles of the anterior compartment?

• Anterior Posterior, Anterior, Posterior, Anterior

• Radial Ulnar, Radial, Ulnar, Radial

• Pass Fail, Pass, Fail, Fail

• Flex Extend, Flex, Extend, Flex

Which muscle is the most proximally located in the deep layer of the posterior compartment?

• Extensor pollicis longus

• Abductor pollicis longus

• Supinator

• Extensor indicis

Which muscle is responsible for extending the index finger?

• Extensor pollicis brevis

• Extensor carpi ulnaris

• Extensor indicis

• Extensor digitorum

Which artery is located along the radial aspect of the forearm?

• Median artery

• Radial artery

• Brachial artery

• Ulnar artery

Which nerve innervates most of the anterior compartment muscles?

• Ulnar nerve

• Musculocutaneous nerve

• Radial nerve

• Median nerve

Which nerve innervates the posterior compartment of the forearm?

• Ulnar nerve

• Radial nerve

• Median nerve

• Axillary nerve

What will the next tutorial in the series focus on?

• Upper arm muscles

• Lower limb anatomy

• Shoulder joint

• Wrist joint and hand